"If you have (or are getting) a STEM degree, you are likely to get shunned" (by environmentalists)
Most environmental concern is BASED on the findings of science,
whereas lack of environmental concern is based on either ignorance or selfish greed.
There are very few definitions of 'environmental concern' that fit your description. The large environmental movements from groups like the Sierra Club and the Greenpeace are hardly based on sound scientific principle.
One of Greenpeace's top 3 bullet points on climate and energy is preaching AGAINST nuclear power, the one technology that can do the most today to reduce our climate impact.
The Sierra Club's website right now has one of it's biggest bullet points as "Save the Bees". This in spite of the fact that bee colony numbers in the Us are at a 20 year high. The activism is lobbying to abolish evil neonicitinoid pesticides that are killing bees. The same neonic pesticides that were adopted to replace ones much more harmful to bees... Not sure we really are helping bees by going backwards, and the alternative of simply banning all pesticides means jacking food prices so high that the poor go back to eating far worse diets again.
Sorry, but environmental concern as represented by the largest self-proclaimed such groups is anything but 'scientific' and is rountinely pushing agendas contrary to the science,